Arulanantham, N, France, K, Hoadley, K et al. (10 more authors) (2018) A UV-to-NIR Study of Molecular Gas in the Dust Cavity around RY Lupi. Astrophysical Journal, 855 (2). 98. ISSN 0004-637X
Abstract
We present a study of molecular gas in the inner disk (r< 20 {au}) around RY Lupi, with spectra from HST-COS, HST-STIS, and VLT-CRIRES. We model the radial distribution of flux from hot gas in a surface layer between r = 0.1–10 au, as traced by Lyα-pumped H₂. The result shows H₂ emission originating in a ring centered at ∼3 au that declines within r < 0.1 au, which is consistent with the behavior of disks with dust cavities. An analysis of the H₂ line shapes shows that a two-component Gaussian profile (FWHM(broad,H₂)=105 ±15 km s‾¹; FWHM(narrow,H₂)=43± 13 km s‾¹ is statistically preferred to a single-component Gaussian. We interpret this as tentative evidence for gas emitting from radially separated disk regions (< {r}broad,H₂}> ∼ 0.4± 0.1 au; {r(narrow,H₂)} ∼ 3± 2 au). The 4.7 μm ¹²CO emission lines are also well fit by two-component profiles ( {{r}broad,CO} =0.4± 0.1 au; {{r}narrow,CO} =15± 2 au). We combine these results with 10 μm observations to form a picture of gapped structure within the mm-imaged dust cavity, providing the first such overview of the inner regions of a young disk. The HST SED of RY Lupi is available online for use in modeling efforts.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The American Astronomical Society. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | ISM: molecules; protoplanetary disks; stars: pre-main sequence |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Astrophysics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Mar 2018 15:53 |
Last Modified: | 21 Mar 2018 15:53 |
Status: | Published |
Publisher: | IOP |
Identification Number: | 10.3847/1538-4357/aaaf65 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:128741 |